High-frequency high-voltage electron irradiation accelerator control system

Abstract

The invention discloses a control system of a high-frequency high-voltage electron irradiation accelerator. The control system comprises a hardware control platform, a lower computer software system and an upper computer monitoring system. The hardware control platform adopts a distributed control topological structure and comprises a core control layer, a local I / O layer and a communication layer; the lower computer software system adopts a layered modular architecture and comprises a variable management module, a main control module, a process control module, a communication management module and a fault diagnosis module; and the upper computer monitoring system comprises a visual human-computer interface. The system realizes communication through Modbus-TCP and Profinet protocols, the process control module executes sequential start-stop control, accurate energy adjustment and beam control of an accelerator, and the fault diagnosis module integrates a multistage fault code system and a self-diagnosis mechanism. Through hardware localization and software independent development, the technical monopoly is broken, the cost is remarkably reduced, the response speed and the resource efficiency are improved by the optimized control logic, and the operation friendliness and the system safety are enhanced by adding an intelligent diagnosis and expert mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electron irradiation accelerators, in particular to a high-frequency high-voltage electron irradiation accelerator control system. BACKGROUND

[0002] As an important industrial equipment, electron irradiation accelerators are widely used in medical device sterilization, food preservation, material modification and other fields. With the continuous improvement of industrial application requirements, higher requirements for the accuracy, stability and reliability of the electron irradiation accelerator control system are put forward. At present, the electron irradiation accelerator control system mainly includes three parts of hardware control platform, lower computer software system and upper computer monitoring system, wherein the hardware control platform is responsible for signal acquisition and execution, the lower computer software system is responsible for logic control, and the upper computer monitoring system provides a human-computer interaction interface.

[0003] At present, the following main problems exist in the field of domestic electron irradiation accelerator control system: first, most of the high-frequency high-voltage electron irradiation accelerator control systems rely on imports, from hardware to software are imported products, resulting in high procurement cost, long supply cycle, and delayed after-sales response; second, the existing control system lacks a distributed control topology, making it difficult to achieve efficient modular management; third, the system communication protocol is single, making it difficult to adapt to complex industrial environment requirements; fourth, the fault diagnosis capability is limited, and it is impossible to provide a multi-level fault code system and a self-diagnosis mechanism; fifth, the control logic of the imported system is usually a "black box", and the underlying logic may be redundant or not fully consistent with the specific process requirements in China. Users are difficult to deeply customize functions, optimize performance and improve efficiency according to their own process characteristics, limiting the full play of the potential of the equipment. At the same time, the closed system architecture also makes it difficult to integrate with emerging intelligent manufacturing systems (such as MES).

[0004] Therefore, it is urgent to develop a cost-controllable, supply chain safe, rapid response and excellent performance of the full self-controllable high-frequency high-voltage electron irradiation accelerator control system to solve the above technical problems. SUMMARY

[0005] In order to solve the problems of high cost, unsafe supply chain, slow response and being at the mercy of technology caused by the dependence on imports of high-frequency high-voltage electron irradiation accelerator control system, and achieve the technical effects of full nationalization, cost reduction, response speed improvement and system performance improvement, the purpose of the present application is to provide a cost-controllable, supply chain safe, rapid response and excellent performance of the full self-controllable new high-frequency high-voltage electron irradiation accelerator control system.

[0006] The present application provides a high-frequency high-voltage electron irradiation accelerator control system, comprising a hardware control platform, a lower computer software system and an upper computer monitoring system.

[0007] The hardware control platform adopts a distributed control topology structure, comprising:

[0008] a core control layer comprising a programmable logic controller;

[0009] a local I / O layer configured with digital input / output modules and analog input / output modules connected with the field device layer; and

[0010] a communication layer disposed with a dual-network-port communication module supporting mutual conversion between a first protocol and a second protocol;

[0011] The lower computer software system runs on the hardware control platform and adopts a layered modular architecture, comprising:

[0012] a variable management module for managing a variable database covering alarm information, process parameters and device states;

[0013] a main control module responsible for system initialization and periodic task scheduling;

[0014] a process control module for executing sequence start-stop control, energy accurate regulation and beam control of the accelerator;

[0015] a communication management module for processing the first protocol to complete data packing and unpacking; and

[0016] a fault diagnosis module integrating a multi-level fault code system and a self-diagnosis mechanism;

[0017] The upper computer monitoring system is in communication connection with the programmable logic controller, and the upper computer system contains a visual human-machine interface of function modules of main control interface, process parameters, device states, alarm records and historical trends.

[0018] In an optional embodiment of the present application, the first protocol comprises a Modbus-TCP protocol, and the second protocol comprises a Profinet protocol; the upper computer monitoring system communicates with the programmable logic controller through the first protocol.

[0019] In an optional embodiment of the present application, the digital input / output module comprises 32-channel digital input modules and 16-channel digital input / output modules; and the analog input / output module comprises 3 four-channel analog inputs and 4-channel analog outputs.

[0020] In an optional embodiment of the present application, the hardware control platform further comprises an expansion layer, which adopts an expandable backplane to reserve slots for system function upgrade.

[0021] In an optional embodiment of the present application, the lower computer software system is written in structured text language or ladder diagram language.

[0022] In an optional embodiment of the present application, the programmable logic controller comprises a high-performance CPU module, which integrates a dual-core processor with a main frequency of 1.2 GHz and is equipped with 256 MB of memory.

[0023] In an optional embodiment of the present application, the host computer monitoring system further integrates an expert operation mode, an intelligent diagnosis function and a PID parameter self-tuning module.

[0024] In an optional embodiment of the present application, the sequential start-stop control strictly follows the process flow of first starting auxiliary equipment, then starting the high-voltage system and finally starting the beam system; the auxiliary equipment includes a fan system, an instrument system and a water cooling system.

[0025] In an optional embodiment of the present application, the host computer monitoring system realizes real-time dynamic refreshing of data points and storage of historical data based on an OPC UA standard interface.

[0026] In an optional embodiment of the present application, the variable management module supports variable cross-referencing and type checking.

[0027] The high-frequency high-voltage type electronic irradiation accelerator control system of the present application realizes overall localization from hardware (PLC, module) to software (control logic, host computer), breaking the foreign technology monopoly; the use of domestic PLC products has obvious price advantages, and domestic processing and production effectively reduce the overall cost and subsequent maintenance cost of the system; relying on a domestic technical support team, the rapid response of after-sales is guaranteed, and the fault solving period is significantly shortened from several weeks to several hours or days, greatly improving the usability of the system; the control logic is written in structured text language or ladder diagram language, optimizing the program efficiency, shortening the program running time, improving the system response speed, reducing the consumption of hardware resources, being able to more quickly adjust the running state of the accelerator, and improving the running efficiency and safety of the system; the host computer adds advanced functions such as expert mode and intelligent diagnosis, improving the operation friendliness and intelligent level of the system, enabling the operator to more conveniently monitor and adjust system parameters, and improving the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed for the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1The figure is a schematic diagram of the high-frequency high-voltage type electronic irradiation accelerator control system of the present application.

[0030] Figure 2 The figure is a schematic diagram of the interface of the host computer monitoring system. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be described in detail with specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. The present application can also be implemented or applied by other different specific embodiments, and various modifications or changes can be made to the details in the specification based on different views and applications without departing from the spirit of the present application. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0032] It should be noted that the diagrams provided in the following examples only illustrate the basic concept of the present application in a schematic manner, and only the components related to the present application are shown in the diagrams, not the number, shape and size of the components when actually implemented. The actual implementation of each component may be a random change in type, number and proportion, and the layout pattern of the components may also be more complex.

[0033] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present application, however, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details, and in other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail, to avoid making the embodiments of the present application difficult to understand.

[0034] By deeply analyzing the process flow of the high-frequency high-voltage type electronic irradiation accelerator, its working process has a strict sequence. First, start the auxiliary equipment, which includes fan system, instrument system, water cooling system and other key parts. The fan system is responsible for ensuring the air circulation inside the equipment, ensuring that the equipment can dissipate heat in time during operation and maintain normal working temperature; the instrument system is used to monitor the various operating parameters of the equipment in real time, providing accurate data support for the operator to adjust the equipment operation state in time; the water cooling system removes a large amount of heat generated during equipment operation through circulating water to ensure stable operation of the equipment. Only when all these auxiliary systems are running normally to create stable environmental conditions for the operation of the accelerator, can the high-voltage system be started.

[0035] After the high-voltage system is turned on, energy exercise begins. In this process, the voltage gradually rises until it reaches the specified parameters. Precise control of the voltage parameters is crucial, as it directly affects the performance of the subsequent beam system and the quality of the irradiation. When the voltage reaches the predetermined value, the beam system is turned on, and the high-energy electron beam is applied to the object to be irradiated by precisely controlling the electron gun beam output, achieving irradiation processing.

[0036] Based on the above process. During the start-up phase of the equipment, it is necessary to achieve sequential start-up control of each device, ensuring that the auxiliary equipment is running normally first, and then starting the high-voltage system and beam system, to avoid equipment damage or abnormal operation due to incorrect start-up sequence. During operation, the control of energy adjustment requires high precision, as it needs to accurately adjust the voltage and current according to different irradiation requirements to achieve stable energy output. Beam control is also critical, as it needs to precisely control the intensity, direction, and position of the electron gun beam output to ensure that the electron beam can uniformly irradiate the object to be processed, improving the uniformity and effectiveness of the irradiation. Fault diagnosis and alarm functions are also essential, as the system should have the ability to monitor the running state of the equipment in real time, and once a fault is detected, it can quickly and accurately determine the fault type and location, and promptly send an alarm signal to notify the operator to handle it, reducing equipment downtime and production losses. Based on these control requirements, hardware selection, software development, and other design work are carried out, thereby building a new type of high-frequency high-voltage electron irradiation accelerator control system that is cost-controllable, supply chain safe, responsive, and has excellent performance. Figure 1 A schematic diagram of the high-frequency high-voltage electron irradiation accelerator control system of the present application is shown.

[0037] As shown in Figure 1 The high-frequency high-voltage electron irradiation accelerator control system includes a hardware control platform 20, a lower computer software system 30, and an upper computer monitoring system 10.

[0038] The hardware control platform 20 adopts a distributed control topology structure, which is composed of a core control layer 21, a local I / O layer 22, a communication layer 23, and an expansion layer 24. The core control layer 21 includes a programmable logic controller, which can be, for example, a high-performance CPU module. As an example, the programmable logic controller is a Hengpanshi PLC, and the CPU module is a TY1002CG model, which integrates a dual-core processor with a main frequency of 1.2 GHz and is equipped with 256 MB of memory. This powerful hardware configuration enables the module to have excellent multi-task parallel processing capability, capable of efficiently handling multiple complex control tasks simultaneously, ensuring stable operation of the system under various working conditions. It can be understood that other models of high-performance CPU modules can also be used.

[0039] The local I / O layer 22 is configured with digital input / output (DI / O) modules and analog input / output (A / O) modules connected to the field device layer 40. The D / O modules, for example, may include 32-channel and 16-channel D / O modules, capable of acquiring large amounts of digital signals in real time, such as device on / off status and sensor trigger signals. They can both receive external digital signals and output control signals, enabling direct control of field devices. The analog input / output modules, for example, may include three 4-channel analog input modules and 4-channel analog output modules, capable of accurately acquiring analog signals, such as continuously changing physical quantities like temperature and pressure, and converting them into digital signals for system processing. They are also responsible for controlling devices requiring analog signal regulation, such as regulating valves and frequency converters. The collaborative work of these modules enables the system to comprehensively and accurately perceive and control various operating parameters of the accelerator. As an example, the model number for the 32-channel digital input module is TY26GPCG, the model number for the 16-channel digital input / output module is TY27GTCG, the model number for the 4-channel analog input module is TY246WCG, and the model number for the 4-channel analog output module is TY258WCG. It is understandable that other models of digital or analog input / output modules can also be used.

[0040] Communication layer 23 is equipped with a dual-port communication module, supporting conversion between the first and second protocols. The first protocol can be, for example, Modbus-TCP or another protocol, and the second protocol can be, for example, Profinet or another protocol. This feature enables the system to communicate efficiently with various types of devices. Whether the device follows the Modbus-TCP protocol or uses the Profinet protocol, stable data interaction can be achieved through this module. For example, it can communicate with a host computer, other intelligent devices (field devices), and remote monitoring systems to achieve real-time data transmission and sharing, facilitating centralized monitoring and remote management of the system. As an example, the model of the dual-port communication module is TY2202CG or another.

[0041] The expansion layer 24, as an optional component, can employ an expandable backplane, reserving ample slots to meet future functional upgrade needs. With continuous technological advancements and evolving user requirements, it may be necessary to add new functional modules, such as more I / O modules or communication modules with special functions. Through this expansion layer 24, the system's functionality can be easily expanded and upgraded simply by inserting the corresponding modules into the reserved slots, without requiring large-scale modifications to the entire hardware system. This reduces the cost and difficulty of system upgrades and improves the system's adaptability and scalability.

[0042] The lower-level software system 30 runs on the hardware control platform 20, adopts a layered modular architecture, and is written using structured text language or ladder diagram language. The lower-level software system 30 includes a variable management module, a main control module, a process control module, a communication management module, and a fault diagnosis module.

[0043] The variable management module manages a database of variables covering alarm information, process parameters, and equipment status. This module supports cross-referencing and type validation of variables, ensuring their accuracy and consistency and preventing system failures due to incorrect variables. For example, during energy regulation, the system automatically verifies the types and value ranges of relevant variables to ensure the safety and effectiveness of the regulation operation.

[0044] The main control module is responsible for system initialization and periodic task scheduling. During system startup, it initializes and configures all hardware devices and software modules to ensure the system is in a normal working state. Simultaneously, it also undertakes the crucial responsibility of periodic task scheduling, sequentially scheduling the execution of each task module according to predetermined time intervals to ensure efficient system operation.

[0045] The process control module is used to execute the accelerator's sequential start-up and shutdown control, precise energy regulation, and beam control. Sequential start-up and shutdown control strictly follows the process flow of starting auxiliary equipment first, then the high-voltage system, and finally the beam system. Auxiliary equipment includes a fan system, instrumentation system, and water cooling system. Regarding energy regulation, voltage and current are precisely adjusted according to different irradiation requirements to ensure stable energy output. In terms of beam control, precise control of the electron gun enables accurate adjustment of beam intensity, direction, and position.

[0046] The communication management module handles the first protocol, completing data packing and unpacking. It can pack internal system data according to the Modbus-TCP protocol format and send it to other devices; at the same time, it can also receive data from other devices, unpack it, and convert it into a format that the system can recognize, thus enabling reliable communication between the system and external devices.

[0047] The fault diagnosis module integrates a multi-level fault code system and a self-diagnostic mechanism. The multi-level fault code system categorizes faults into different levels, classifying them according to their severity for easy assessment by operators to determine the urgency and priority of handling. The self-diagnostic mechanism monitors the system's operational status in real time, automatically detects potential faults, and identifies them using fault codes, providing strong support for troubleshooting and repair.

[0048] The host computer monitoring system 10 communicates with the programmable logic controller (PLC) via a first protocol. The host computer monitoring system 10 is used for configuration screens, primarily for monitoring and controlling the entire system. It supports setting communication parameters to enable communication with the PLC, reading and sending signals to the PLC. The host computer system includes a visual human-machine interface with functional modules for main control, process parameters, equipment status, alarm records, and historical trends. Figure 2 A schematic diagram of the visual human-machine interface of the host computer monitoring system 10 is given.

[0049] The main control interface, as the core interface of the system, centrally displays the accelerator's key operating parameters and status information, such as voltage, current, beam current intensity, and equipment operating status. Operators can monitor and operate the accelerator as a whole on this interface. The process parameter module displays the set values ​​and actual operating values ​​of various process parameters in detail, facilitating parameter adjustments by operators according to different irradiation requirements. The equipment status module presents the operating status of each piece of equipment in an intuitive way, such as the start-up, stop, and fault status of the equipment. Once an abnormality occurs, operators can quickly detect it and take corresponding measures. The alarm record module records all alarm information that occurs in the system in real time, including alarm time, alarm type, and alarm location, which facilitates fault tracing and analysis by operators. The historical trend module displays the historical change trends of key parameters in the form of charts, such as the changes of parameters like voltage, current, and beam current intensity over a period of time. By analyzing historical trends, operators can predict the operating status of the equipment and detect potential problems in advance.

[0050] The host computer monitoring system 10 utilizes the OPC UA standard interface to achieve real-time dynamic refreshing of data points and storage of historical data. The OPC UA standard interface boasts excellent versatility and scalability, ensuring stable and reliable data interaction between the system and various devices. Through this interface, the system can acquire large amounts of device data in real time and bind this data to corresponding elements on the host computer screen, enabling dynamic data display. Simultaneously, the system also supports historical data archiving, allowing for long-term storage of important operational data for subsequent querying and analysis.

[0051] In an optional embodiment, the host computer monitoring system 10 also integrates an expert operation mode, intelligent diagnostic functions, and a PID parameter self-tuning module. The expert operation mode provides experienced operators with higher control authority and a more intuitive interface, allowing for finer parameter adjustments and system configuration to meet specific irradiation requirements. The intelligent diagnostic function utilizes advanced algorithms and models to perform real-time analysis and diagnosis of system operating data, automatically identifying potential faults and anomalies and providing corresponding solutions. The PID parameter self-tuning module automatically adjusts the PID controller parameters based on the system's real-time operating status, enabling the system to better adapt to different operating conditions and improving control accuracy and stability.

[0052] This high-frequency, high-voltage electron irradiation accelerator control system achieves complete localization from hardware (PLC, modules) to software (control logic, host computer), breaking the foreign technology monopoly and solving the bottleneck problem. Using domestically produced PLC products offers a significant price advantage, and domestic processing and production effectively reduce the overall system cost and subsequent maintenance expenses. Relying on a domestic technical support team ensures rapid after-sales response, significantly shortening the fault resolution cycle from weeks to hours or days, greatly improving system availability. Using structured text or ladder logic to write the control logic optimizes program efficiency, shortens program execution time, improves system response speed, reduces hardware resource consumption, and enables faster adjustments to the accelerator's operating status, improving system efficiency and safety. The host computer adds advanced functions such as expert mode and intelligent diagnostics, enhancing the system's user-friendliness and intelligence, allowing operators to more easily monitor and adjust system parameters, thus improving work efficiency.

[0053] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0054] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A high-frequency, high-voltage electron irradiation accelerator control system, characterized in that, This includes a hardware control platform, a lower-level software system, and a higher-level monitoring system. The hardware control platform adopts a distributed control topology, including: The core control layer includes programmable logic controllers; The local I / O layer is configured with digital input / output modules and analog input / output modules that connect to the field device layer; and The communication layer is equipped with a dual-port communication module that supports mutual conversion between the first and second protocols. The lower-level software system runs on the hardware control platform and adopts a layered modular architecture, which includes: The variable management module is used to manage a variable database that covers alarm information, process parameters, and equipment status. The main control module is responsible for system initialization and periodic task scheduling; The process control module is used to perform sequential start-up and shutdown control, precise energy adjustment, and beam control of the accelerator. The communication management module is used to process the first protocol, completing data packing and unpacking; and The fault diagnosis module integrates a multi-level fault code system and a self-diagnosis mechanism; The host computer monitoring system is communicatively connected to the programmable logic controller. The host computer system includes a visual human-machine interface with functional modules such as main control interface, process parameters, equipment status, alarm records and historical trends.

2. The high-frequency, high-voltage electron irradiation accelerator control system according to claim 1, characterized in that, The first protocol includes the Modbus-TCP protocol, and the second protocol includes the Profinet protocol; the host computer monitoring system communicates with the programmable logic controller through the first protocol.

3. The high-frequency, high-voltage electron irradiation accelerator control system according to claim 1, characterized in that, The digital input / output module includes a 32-channel digital input module and a 16-channel digital input / output module; the analog input / output module includes three 4-channel analog inputs and four analog outputs.

4. The high-frequency, high-voltage electron irradiation accelerator control system according to claim 1, characterized in that, The hardware control platform also includes an extension layer, which uses an expandable backplane and reserves slots for system function upgrades.

5. The high-frequency, high-voltage electron irradiation accelerator control system according to claim 1, characterized in that, The lower-level machine software system is written using structured text language or ladder diagram language.

6. The high-frequency, high-voltage electron irradiation accelerator control system according to claim 1, characterized in that, The programmable logic controller includes a high-performance CPU module, which integrates a dual-core processor with a clock speed of 1.2 GHz and is equipped with 256 MB of memory.

7. The high-frequency, high-voltage electron irradiation accelerator control system according to claim 1, characterized in that, The host computer monitoring system also integrates an expert operation mode, intelligent diagnostic function, and PID parameter self-tuning module.

8. The high-frequency, high-voltage electron irradiation accelerator control system according to claim 1, characterized in that, The sequential start-stop control strictly follows the process flow of starting the auxiliary equipment first, then starting the high-voltage system, and finally starting the beam system; the auxiliary equipment includes a fan system, an instrumentation system, and a water cooling system.

9. The high-frequency, high-voltage electron irradiation accelerator control system according to claim 1, characterized in that, The host computer monitoring system uses the OPC UA standard interface to achieve real-time dynamic refreshing of data points and storage of historical data.

10. The high-frequency, high-voltage electron irradiation accelerator control system according to claim 1, characterized in that, The variable management module supports variable cross-referencing and type validation.

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